Two-Piece, True Floating, stock replacement rotors are here...
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For a single stop you won't see any difference. The limiting factor for our brakes is the grip that the front tires can provide. The difference between these rotors and a 1 piece rotor is that under heavy use they won't warp as easily AND, due to lighter weight, ride comfort may improve.
IN racing or performance driving, the reason for the lighter and two piece rotors is two fold: 1. Better heat dissipation (i.e. less fade) and 2. Less unsprung weight (for both wheels and brakes). Thats why this design, if it works, will be a great addition to any car thats driven in a "spirited" manner. Theres better heat dissipation and the suspension is working that much "less". Now if we could combine Brandon's rotors with an even lighter set of wheels, we'd be great.
Glenn
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From: NY
2014 E350 4Matic
I'm in for a set of slotted/drilled front rotors for the C55. I would imagine, given your post above, that they will be ready in the middle of May. Keep us posted!
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Regardless of the springs both rotors are semi-floating due to the bolt tension. A true full floating rotor would not have the two assemblies bolted together. A full floating rotor, you would be able to move the rotor around with your hands. Much like a motorcycle rotor.
The black buttons hold the two parts together with out any clamping force allowing the rotor to move freely.
"Floating" is pure marketing. All two piece brake rotors have to have float. Steel and aluminum expand at different rates and without "float" engineered into the assembly the rotor or hat would distort. This is not an issue in a one piece rotor due to the fact that it is all the same material.
Last edited by JDC55; May 1, 2008 at 01:03 AM.
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Part 2
You can see this on the photos of the AMG two piece rotor (also a Brembo part)
In this photo you can see the U shaped channel in the black aluminum hat.
In this photo you can see the metal bobbin that rides in the U channel.
This allows the rotor and hat to move independently of each other.
I hope this gives you a better understanding of how float works.
You can see this on the photos of the AMG two piece rotor (also a Brembo part)
In this photo you can see the U shaped channel in the black aluminum hat.
In this photo you can see the metal bobbin that rides in the U channel.
This allows the rotor and hat to move independently of each other.
I hope this gives you a better understanding of how float works.
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From: Boise, ID, USA
300D, 500E, E420
The rear rotor has the integrated parking brake mechanism, making it difficult, if not impossible, to make a lightweight center hat. Do you have an alternative in mind for this, or would the parking brake just be deleted if 2-piece rear rotors were produced?
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Question about the rear rotors:
The rear rotor has the integrated parking brake mechanism, making it difficult, if not impossible, to make a lightweight center hat. Do you have an alternative in mind for this, or would the parking brake just be deleted if 2-piece rear rotors were produced?
The rear rotor has the integrated parking brake mechanism, making it difficult, if not impossible, to make a lightweight center hat. Do you have an alternative in mind for this, or would the parking brake just be deleted if 2-piece rear rotors were produced?
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From: Barcelona-Spain
Brabus K3
I WILL ALSO BE INTERESTED.
By the other hand why not use in this setup the Brembo/McLaren Spring or the Stoptech Belleville Washer so they will be a lot more "floating"?
Best Regards.
Super Member
Joined: Sep 2007
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From: Miami
Bicycle
Mercedes parking brakes are independent of the rear rotor, they don't use the inside surface of the rear rotor to break; they have another part inside so the hat of the rear rotor can be 100% aluminium.
I WILL ALSO BE INTERESTED.
By the other hand why not use in this setup the Brembo/McLaren Spring or the Stoptech Belleville Washer so they will be a lot more "floating"?
Best Regards.
I WILL ALSO BE INTERESTED.
By the other hand why not use in this setup the Brembo/McLaren Spring or the Stoptech Belleville Washer so they will be a lot more "floating"?
Best Regards.
Senior Member
Joined: Oct 2007
Posts: 333
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From: utah
02 c32 99 superduty
Mercedes parking brakes are independent of the rear rotor, they don't use the inside surface of the rear rotor to break; they have another part inside so the hat of the rear rotor can be 100% aluminium.
I WILL ALSO BE INTERESTED.
By the other hand why not use in this setup the Brembo/McLaren Spring or the Stoptech Belleville Washer so they will be a lot more "floating"?
Best Regards.
I WILL ALSO BE INTERESTED.
By the other hand why not use in this setup the Brembo/McLaren Spring or the Stoptech Belleville Washer so they will be a lot more "floating"?
Best Regards.
Super Member
Joined: Sep 2007
Posts: 784
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From: Miami
Bicycle
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C55 AMG
Can anyone tell me this- how would the weight savings on a rotor compare to weight savings on a wheel? I would think that because the mass is close to the center of rotation that it would have less of an impact than shaving the same weight off of your tires/wheels. Maybe someone in the race scene can offer some info?
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From: NY
2014 E350 4Matic
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From: Philadelphia, PA
2008 A8L, 2002 996TT X50, 2009 X5
Can anyone tell me this- how would the weight savings on a rotor compare to weight savings on a wheel? I would think that because the mass is close to the center of rotation that it would have less of an impact than shaving the same weight off of your tires/wheels. Maybe someone in the race scene can offer some info?
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From: Diamond Bar, CA
W206 PHEV AMG
Can anyone tell me this- how would the weight savings on a rotor compare to weight savings on a wheel? I would think that because the mass is close to the center of rotation that it would have less of an impact than shaving the same weight off of your tires/wheels. Maybe someone in the race scene can offer some info?
